Beer keg



FIG. 1 is a side elevational view of a beer keg, showing my new design;

FIG. 2 is an elevational view looking from the right of FIG. 1;

FIG. 3 is a top plan view on a reduced scale;

FIG. 4 is a bottom plan view on a reduced scale;

FIG. 5 is a side elevational view showing a modified form of my new design and on the same scale as FIG. 1; and

FIG. 6 is a vertical sectional view taken from left to right through the center of FIG. 1. 

The ornamental design for a beer keg, as shown and described. 